Standard rate for tuners are $900
Though if the tuner uses SCT factor in another $600 for the SCT box, that box stays with u and gives u data logging and fault codes if any pop up.
Id suggest - injectors, high flow cat, dump pipe, and cooler, those parts can be found second hand and mite only cost $1500-2k, new it would be around $3500-4k.
The car would gain around 100rwkw from those mods